4D Seismic Interpretation in the Marlim Field, Campos Basin, Offshore Brazil

Sansonowski, Rui; Oliveira, Rildo Marcio; Ribeiro, Nier; Bampi, Dirceu; Junior, Luciano F. Camarão

doi:10.3997/2214-4609-pdb.172.sbgf0484_07

Cited by 2 publications

(1 citation statement)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Another comparison was performed with the results obtained by Sansonowski et al (2007), who used the 1997 seismic volume as a baseline and a 2005 acquisition as a monitor. They obtained the difference volume based on those data, from which they could extract seismic anomaly bodies.…”

Section: Resultsmentioning

confidence: 99%

Integration of geophysical and geomechanical data to understand the depletion of the Marlim field, Campos Basin

Torres

Barroso

2021

Geol. USP. Sér. Cient.

View full text Add to dashboard Cite

Located in the Campos Basin, Brazil, the Marlim field, consists of two turbidite systems deposited during eustatic sea-level variations in the Oligocene/Miocene. The reservoir was discovered in 1985, and its production started to decline in 2002. One of the techniques selected to assist in the recovery of oil from the reservoir was the 4D seismic. However, its interpretation can be complex. In order to help address this issue, the present study proposed an analysis of the depletion of a small field area from 1997 to 2010, combining geophysical (4D seismic) and geomechanical (pore pressure) data through the construction of pore pressure 3D models for both years, which can be subtracted and compared to seismic anomalies. The results obtained were: an average depletion of 0.42 ppg (50.33 kg/m3) of pore pressure gradient in the field; the identification of potential fluid-flow barriers, such as an NW-SE-oriented channel and sealing faults; and the detection of two areas with an expressive presence of 4D seismic anomalies, one of them showing a quite evident difference between pore pressure gradients, suggesting field depletion. The use of very old and noisy seismic data hindered the application of this methodology. Nevertheless, this research demonstrated the relevance of estimating pore pressure in the reservoir and how this geomechanical parameter can be useful in assessing the level of field depletion.

show abstract

Section: Resultsmentioning

confidence: 99%

Integration of geophysical and geomechanical data to understand the depletion of the Marlim field, Campos Basin

Torres

Barroso

2021

Geol. USP. Sér. Cient.

View full text Add to dashboard Cite

show abstract

Tupi Nodes pilot: A successful 4D seismic case for Brazilian presalt reservoirs

Cruz

Teixeira

et al. 2021

The Leading Edge

View full text Add to dashboard Cite

The oil and gas industry has established 4D seismic as a key tool to maximize oil recovery and operational safety in siliciclastic and low- to medium-stiffness carbonate reservoirs. However, for the stiffer carbonate reservoirs of the Brazilian presalt, the value of 4D seismic is still under debate. Tupi Field has been the stage of a pioneering 4D seismic project to field test the time-lapse technique's ability in monitoring production and water-alternating-gas (WAG) injection in the Brazilian presalt. Ocean-bottom node (OBN) technology was applied for the first time in the ultra-deep waters of Santos Basin, leading to the Tupi Nodes pilot project. We started with feasibility studies to forecast the presalt carbonate time-lapse responses. The minerals that constitute these carbonate rocks have an incompressibility modulus that is generally twice as large as those of siliciclastic rocks. This translates into discrete 4D signals that require enhanced seismic acquisition and processing techniques to be correctly detected and mapped. Consequently, two OBN seismic acquisitions were carried out. Time-lapse processing included the application of top-of-the-line processing tools, such as interbed multiple attenuation. The resulting 4D amplitude images demonstrate good signal-to-noise ratio, supporting both static and dynamic interpretations that are compatible with injection and production histories. To unlock the potential of 4D quantitative interpretation and the future employment of 4D-assisted history-matching workflows, we conducted a 4D seismic inversion test. Acoustic impedance variations of about 1.5% are reliably distinguishable beyond the immediate vicinity of the wells. These 4D OBN seismic surveys and interpretations will assist in identifying oil-bypassed targets for infill wells and calibrating WAG cycles, increasing oil recovery. We anticipate that studies of the entire Brazilian presalt section will greatly benefit from the results and conclusions already reached for Tupi Field.

show abstract

4D Seismic Interpretation in the Marlim Field, Campos Basin, Offshore Brazil

Cited by 2 publications

References 7 publications

Integration of geophysical and geomechanical data to understand the depletion of the Marlim field, Campos Basin

Integration of geophysical and geomechanical data to understand the depletion of the Marlim field, Campos Basin

Tupi Nodes pilot: A successful 4D seismic case for Brazilian presalt reservoirs

Contact Info

Product

Resources

About